package com.sky.service.impl;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.PostMapping;

import java.time.LocalDateTime;



@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //  后期需要进行md5加密，然后再进行比对
        password =DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param dto
     */
    @Override
    public void insertEmp(EmployeeDTO dto) {
    //需要用employee对象来存储数据
        Employee employee = new Employee();
        //属性拷贝把dto的数据拷贝到employee对象中
        BeanUtils.copyProperties(dto,employee);
        //补充基本属性设置密码 PasswordConstant.DEFAULT_PASSWORD是常量
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置常量状态默认为1
        employee.setStatus(StatusConstant.ENABLE);
//        //设置创建时间和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        //设置创建人和修改人从ThreadLocal中获取登录人id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        //调用mapper方法
        employeeMapper.insertEmp(employee);
    }

    /**
     * 分页查询员工
     * @param dto
     * @return
     */
    @Override
    public PageResult empPage(EmployeePageQueryDTO dto) {
        //0.员工分页查询---需要使用分页插件
        //1.设置分页参数
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
        //2.调用mapper的查询方法，并强转返回类型为Page
       Page<Employee> page= employeeMapper.list(dto.getName());
       //3.封装PageResult对象并返回
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 员工的启动禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //更新员工对象的状态和修改时间和修改人
        Employee employee =Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.update(employee);
    }

    /**
     * 回显员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    /**
     * 修改员工信息
     * @param dto
     */
    @Override
    public void update(EmployeeDTO dto) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(dto,employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public void editPassword(PasswordEditDTO dto) {
        //THreadLocal对象获取用户id
        Long empId = BaseContext.getCurrentId();
        //查看数据库中的信息
        Employee employee = employeeMapper.getById(empId);
        //解析前端传过来的密码
        String pwd = DigestUtils.md5DigestAsHex(dto.getOldPassword().getBytes());
        //判断原密码是否一致
        if (!pwd.equals(employee.getPassword())){
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        //如果输入的原密码与数据库密码相同，则进行修改，把newPassword进行MD5加密存入数据库，密码修改成功
        employee.setPassword(DigestUtils.md5DigestAsHex(dto.getNewPassword().getBytes()));
        //更新修改时间和修改人
//        employee.setUpdateUser(empId);
//        employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
    }


}
